US6638471B1 - Water cooled vessel for vacuum processing liquid steel - Google Patents

Water cooled vessel for vacuum processing liquid steel Download PDF

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Publication number
US6638471B1
US6638471B1 US09/700,900 US70090001A US6638471B1 US 6638471 B1 US6638471 B1 US 6638471B1 US 70090001 A US70090001 A US 70090001A US 6638471 B1 US6638471 B1 US 6638471B1
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US
United States
Prior art keywords
vessel
metal jacket
process vessel
interior
water
Prior art date
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Expired - Fee Related
Application number
US09/700,900
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English (en)
Inventor
F. Wagener
Arno Luven
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SIEMENS VAI METALS TECHNOLOGIES GmbH
TECHNOMEIAL GESELLSCHAFT fur METALLTECHNOLOGIE MBH
Original Assignee
Technometal Gesellschaft fuer Metalltechnologie mbH
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Assigned to TECHNOMEIAL GESELLSCHAFT FUR METALLTECHNOLOGIE MBH reassignment TECHNOMEIAL GESELLSCHAFT FUR METALLTECHNOLOGIE MBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FRIEDHELM WAGNER, LUVEN, ARNO
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Assigned to SIEMENS VAI METALS TECHNOLOGIES GMBH reassignment SIEMENS VAI METALS TECHNOLOGIES GMBH CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: TECHNOMETAL GESELLSCHAFT FUR METALLTECHNOLOGIE MBH
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    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
    • C21C7/10—Handling in a vacuum

Definitions

  • the present invention relates to a process vessel for vacuum processing liquid steel comprising a lower part that has submersible pipes located thereon and an upper part, furthermore having a heating apparatus, a feed device, and a waste gas connection arranged at a right angle to the central axis of the vessel, whereby the process vessel has an outer metal jacket and a refractory lining arranged in the interior of the lower part of the vessel, and whereby the metal jacket of the upper part of the vessel, including the waste gas connection, is provided with a water-cooling device and is exposed directly on the interior side to the process conditions prevailing in the interior of the vessel.
  • JP-A-04 103 713 describes a steel process vessel with the aforesaid features; such a process vessel is used for secondary treatment, e.g. degassing liquid steel, in that the vessel's submersible pipes located on the lower part are lowered into a pan filled with liquid steel and the liquid steel is suctioned into the process vessel under a vacuum and, after the process phase, is returned to the pan.
  • a process vessel is used for secondary treatment, e.g. degassing liquid steel
  • the vessel's submersible pipes located on the lower part are lowered into a pan filled with liquid steel and the liquid steel is suctioned into the process vessel under a vacuum and, after the process phase, is returned to the pan.
  • connecting branches arranged on an incline for introducing alloy materials and for connecting a burner/heating device.
  • JP-A-04 103 713 which describes the generic process vessel, suggests providing its metal jacket with a water-cooling device and exposing it directly on the interior side to the process conditions prevailing in the interior of the vessel.
  • process vessels also involve the problem of sufficiently cooling the waste gases, and for this purpose a gas cooler is attached to the vessel downstream, which is not addressed in the generic JP-A-04 103 713 and which requires corresponding complexity in terms of construction.
  • the object of the invention is therefore to provide the necessary cooling of the waste gases with the least possible complexity in terms of construction in a process vessel with the aforementioned features.
  • the invention provides that the metal jacket provided with the water-cooling device extends across the waste gas connection and forms a gas cooling segment connected to the waste gas connection of the vessel.
  • the metal jacket designed for water cooling has at its surface on the interior of the vessel a coating made from a material with high heat conductivity, whereby the coating preferably comprises copper.
  • the coating preferably comprises copper.
  • the metal jacket has two walls in the region designed for water cooling and is provided with connections for supplying cooling water and for eliminating heated water.
  • the vessel jacket comprises a vertically-running pipe-to-pipe construction in its region designed for water cooling, whereby the, e.g. round or square, pipes form the intermediate space for conducting the cooling water.
  • the metal jacket designed for water cooling is provided, at its flange connection to the vessel part having a refractory lining, on the inner side with insulation made of a refractory material that extends across a limited transition region.
  • the insulation arranged in the transition region on the metal jacket designed for water cooling can be thinner than the lining of the adjacent vessel part.
  • the jacket designed for water cooling at its flange connection to the vessel part having a refractory lining, is arranged offset to the interior of the vessel by the difference in thickness between the insulation and the lining.
  • FIG. 1 illustrates a steel process vessel known from prior art with a water-cooled upper part
  • FIG. 2 is a sectional illustration of the transition between the water-cooled upper part and the middle part of the process vessel in accordance with FIG. 1 that is provided with a refractory lining;
  • FIG. 3 illustrates another exemplary embodiment of a steel process vessel known from prior art with an upper part and a middle part provided with water-cooled walls;
  • FIG. 4 illustrates the process vessel embodied in accordance with the invention with a gas cooling segment connected to the waste gas connection.
  • FIGS. 1 through 3 The exemplary embodiments of the process vessel illustrated in FIGS. 1 through 3 are not included in the inventive idea and are therefore explained in the following in order to provide a better understanding of the subject matter of the invention.
  • the process vessel 10 schematically illustrated in FIG. 1 comprises a lower part 11 with submersible pipes 12 attached thereto, a middle part 13 that is located thereabove by means of a flange connector 21 and that has feed devices 14 , and an upper part 15 that has, arranged at a right angle to the central axis of the process vessel 10 , a waste gas connection 16 , to which a gas cooler 17 is attached in the illustrated exemplary embodiment.
  • An expansion joint 18 is interposed between the waste gas connection 16 and gas cooler 17 .
  • the entire vessel has an outer metal jacket 19 , the lower part 11 and the middle part 13 of the process vessel 10 having a refractory lining 20 arranged in the interior of the vessel.
  • the upper part 15 is embodied with only the metal jacket 19 , which is provided with a water-cooling device as shown in FIG. 2 .
  • the vessel jacket for the upper part 15 is embodied with two walls, the outer metal jacket 19 and an inner metal jacket 22 , which together form an intermediate space 23 for conducting cooling water.
  • the region of the metal jacket 19 adjacent to the flange connector 21 is provided with internal insulation 26 in a transition area. Since this insulation 26 is not as thick as the entire lining 20 of the adjacent middle part 13 of the process vessel 10 , the upper part 15 is arranged offset to the interior of the vessel by an amount equal to the difference between the thickness of the insulation 26 and the thickness of the refractory lining 20 .
  • the lining 20 comprises an outer lining 24 applied to the metal jacket 19 of the middle part 13 , this outer lining connecting to the inside of the working lining 25 .
  • the insulation 26 of the upper part 15 has the same structure as the outer lining 24 of the lower part 11 .
  • the upper part 15 has a metal jacket 19 with water cooling
  • the middle part 13 does, as well, down to its flange connector 21 for connecting to the lower part 11 , which itself is provided with a refractory lining 20 .
  • a coating 30 made of copper in the region of the middle part 13 is affixed to the surface of the middle part 13 in the interior of the vessel and to the upper part 15 and contributes to preventing skull from adhering due to the heat elimination from the vessel transition to the water cooling of the metal jacket 19 , which has a shock-type effect.
  • FIG. 4 illustrates that in a device in which the middle part 13 and the upper part 15 have a water-cooled jacket 19 , the waste gas temperature can be caused to drop far enough that a conventional gas cooler is not necessary in that connected to the upper part 15 is a gas cooling segment 27 that is also provided with a water-cooled metal jacket 19 of the same design as for the middle part 13 and the upper part 15 .

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)
  • Furnace Details (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Muffle Furnaces And Rotary Kilns (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Treatment Of Steel In Its Molten State (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)
US09/700,900 1998-05-16 1999-05-17 Water cooled vessel for vacuum processing liquid steel Expired - Fee Related US6638471B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19822159A DE19822159A1 (de) 1998-05-16 1998-05-16 Mit einer Wasserkühlung versehenes Gefäß für die Behandlung von flüssigem Stahl
DE19822159 1998-05-16
PCT/DE1999/001472 WO1999060174A1 (de) 1998-05-16 1999-05-17 Mit einer wasserkühlung versehenes gefäss für die vakuumbehandlung von flüssigem stahl

Publications (1)

Publication Number Publication Date
US6638471B1 true US6638471B1 (en) 2003-10-28

Family

ID=7868094

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/700,900 Expired - Fee Related US6638471B1 (en) 1998-05-16 1999-05-17 Water cooled vessel for vacuum processing liquid steel

Country Status (10)

Country Link
US (1) US6638471B1 (es)
EP (1) EP1088112B1 (es)
KR (1) KR100439642B1 (es)
CN (1) CN1243837C (es)
AT (1) ATE231924T1 (es)
BR (1) BR9910506A (es)
DE (2) DE19822159A1 (es)
ES (1) ES2192061T3 (es)
RU (1) RU2201459C2 (es)
WO (1) WO1999060174A1 (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9038867B2 (en) 2011-05-11 2015-05-26 Tyk America, Inc. Degasser snorkel with serpentine flow path cooling
US9644246B2 (en) 2011-05-11 2017-05-09 Tyk America, Inc. Degasser snorkel with serpentine flow path cooling

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0424967D0 (en) * 2004-11-12 2004-12-15 Hamworthy Combustion Eng Ltd Incinerator for boil-off gas

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3565411A (en) * 1967-04-28 1971-02-23 Hoesch Ag Vacuum vessel for degassing molten metals
DE4130590A1 (de) 1991-09-12 1993-03-25 Mannesmann Ag Entgasungsgefaess fuer die vakuumbehandlung von fluessigem stahl
US5520373A (en) * 1994-09-02 1996-05-28 Inland Steel Company Steelmaking degassing apparatus

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04103713A (ja) * 1990-08-20 1992-04-06 Nippon Steel Corp 溶鋼の高速脱ガス方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3565411A (en) * 1967-04-28 1971-02-23 Hoesch Ag Vacuum vessel for degassing molten metals
DE4130590A1 (de) 1991-09-12 1993-03-25 Mannesmann Ag Entgasungsgefaess fuer die vakuumbehandlung von fluessigem stahl
US5299784A (en) * 1991-09-12 1994-04-05 Mannesmann Aktiengesellschaft Degassing vessel for the vacumm treatment of liquid steel
US5520373A (en) * 1994-09-02 1996-05-28 Inland Steel Company Steelmaking degassing apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
Patent Abstracts of Japan, No. 04103713 dated Apr. 6, 1992.
Wagener F et al, "Future development in secondary steelmaking", Steel Times International, Sep. 1998, XP-000790090.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9038867B2 (en) 2011-05-11 2015-05-26 Tyk America, Inc. Degasser snorkel with serpentine flow path cooling
US9644246B2 (en) 2011-05-11 2017-05-09 Tyk America, Inc. Degasser snorkel with serpentine flow path cooling

Also Published As

Publication number Publication date
WO1999060174A1 (de) 1999-11-25
DE19822159A1 (de) 1999-11-18
CN1243837C (zh) 2006-03-01
KR100439642B1 (ko) 2004-07-12
DE59904170D1 (de) 2003-03-06
KR20010071274A (ko) 2001-07-28
EP1088112A1 (de) 2001-04-04
ATE231924T1 (de) 2003-02-15
EP1088112B1 (de) 2003-01-29
BR9910506A (pt) 2001-01-30
ES2192061T3 (es) 2003-09-16
RU2201459C2 (ru) 2003-03-27
CN1308687A (zh) 2001-08-15

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Effective date: 20151028